SEE ALSO MURDER by Larry D. Sweazy
I've just finished Larry D. Sweazy's See Also Murder ©2015. The scene is North Dakota, I think in the 1960s. The protagonist, Marjorie Trumaine, is a farm wife, an indexer (to make ends meet), and an amateur detective. Many times throughout the story I thought the plot was moving too slowly, but really, it's just right.